Moved the majority of WebGL functionality into WebGLRenderingContextBase

Source/core/html/canvas/EXTFragDepth.h

Index: Source/core/html/canvas/EXTFragDepth.h
diff --git a/Source/core/html/canvas/EXTFragDepth.h b/Source/core/html/canvas/EXTFragDepth.h
index 3c0563efb6a412fb39a0b1639c772127cb8f9f34..eee90dcc021334c63e7628e2e4d298e18887618a 100644
--- a/Source/core/html/canvas/EXTFragDepth.h
+++ b/Source/core/html/canvas/EXTFragDepth.h
@@ -34,15 +34,15 @@ namespace WebCore {
 
 class EXTFragDepth FINAL : public WebGLExtension, public ScriptWrappable {
 public:
-    static PassRefPtr<EXTFragDepth> create(WebGLRenderingContext*);
-    static bool supported(WebGLRenderingContext*);
+    static PassRefPtr<EXTFragDepth> create(WebGLRenderingContextBase*);
+    static bool supported(WebGLRenderingContextBase*);
     static const char* extensionName();
 
     virtual ~EXTFragDepth();
-    virtual ExtensionName name() const OVERRIDE;
+    virtual WebGLExtensionName name() const OVERRIDE;
 
 private:
-    explicit EXTFragDepth(WebGLRenderingContext*);
+    explicit EXTFragDepth(WebGLRenderingContextBase*);
 };
 
 } // namespace WebCore